$OpenBSD: patch-base_process_process_posix_cc,v 1.1 2015/05/26 17:37:39 robert Exp $
--- base/process/process_posix.cc.orig.port	Wed May 20 11:39:29 2015
+++ base/process/process_posix.cc	Wed May 20 11:39:47 2015
@@ -16,6 +16,7 @@
 #if defined(OS_MACOSX)
 #include <sys/event.h>
 #endif
+#include <signal.h>
 
 namespace {
 
